Siemens 3RT2916-1BB00 SIRIUS Varistor Surge Suppressor 24-48V AC for 3RT2.1

The Siemens 3RT2916-1BB00 is a SIRIUS varistor surge suppressor designed to clip onto 3RT2.1 contactors (size S00) and 3RH2 auxiliary contactors. It absorbs voltage spikes on the contactor coil during opening to prevent overshoot damage in adjacent electronics. Rated for 24-48 V AC (50/60 Hz) and 24-70 V DC control supply.

Technical specifications:

• Order number (MLFB): 3RT2916-1BB00
• Manufacturer: Siemens
• Product line: SIRIUS
• Product category: Surge suppressor
• Product designation: Varistor
• Suitable for: 3RT2.1 contactors and 3RH2 auxiliary contactors
• Contactor size compatibility: S00
• Control supply voltage AC: 24-48 V (50/60 Hz)
• Control supply voltage DC: 24-70 V
• Design: Varistor
• Mounting: Clip-on (any mounting position)
• Dimensions (H × W × D): 46 × 28 × 9 mm
• Net weight: 6 g
• Ambient temperature during operation: -25 to +60 °C
• Storage temperature: -40 to +80 °C
• Certifications: CE, UL, CSA
• Approvals: General Product Approval, EMC, Maritime application, type test

Features and benefits:

• Clip-on mounting without tools - fast retrofit on existing contactor installations
• Voltage-symmetric varistor - works in both AC and DC control circuits without polarity concern
• Slim 9 mm depth - does not significantly increase contactor stack height
• UL/CSA listed - usable in North American panels
• Maritime approval - suitable for shipboard control circuits

Applications:

• Coil-induced surge suppression on 3RT2.1 contactors switching by PLC outputs or solid-state relays
• Protection of PLC outputs and proximity sensors against contactor switch-off spikes
• Improved EMC behavior of motor control panels using small contactors

Also known as: Siemens 3RT2916-1BB00, SIRIUS varistor for 3RT2.1, contactor coil surge suppressor 24-48V AC, 3RT29 varistor S00.